Paging Early Indication Location for Low-Power UE Monitoring
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Solution Overview
Problem
User equipment (UE) in wireless communication systems experience unnecessary power consumption due to actively monitoring paging occasions, especially for UEs with low paging probability, leading to excessive detection of unnecessary paging messages.
Innovation Solution
Determine the location of paging early indication (PEI) using frame-level and symbol-level offsets to indicate whether a UE needs to receive a paging physical downlink control channel, thereby reducing unnecessary power consumption and improving power saving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE actively monitors paging occasions in each paging cycle, then UE can obtain paging messages, but power consumption increases unnecessarily for UEs with low paging probability
Solution Approach 1:
The patent introduces a paging early indication (PEI) that is transmitted before the paging occasion to preliminarily indicate whether a paging message will be sent. UEs monitor this early indication first, and only proceed to monitor the full paging occasion if the indication shows paging is present. This preliminary action allows UEs with low paging probability to avoid unnecessary power consumption while ensuring they don't miss actual paging messages.
2Measurement precision
If UE monitors paging occasions frequently, then paging messages can be detected, but unnecessary paging detection increases power consumption
Solution Approach 1:
The patent extracts the essential paging indication information from the full paging occasion and places it in a separate, earlier PEI message. This allows UEs to obtain the critical information about whether paging is present without having to process the entire paging occasion, thereby reducing power consumption while maintaining detection accuracy for actual paging messages.
3Ease of operation
If PEI location is not accurately determined, then UE can simplify monitoring, but blind detection increases power consumption
Solution Approach 1:
The patent provides preliminary configuration information about PEI location through system information or RRC signaling, including parameters like pei-Periodicity, pei-Offset, and firstPDCCH-MonitoringOccasionOfPEI. This preliminary information allows UEs to accurately determine PEI locations without blind detection, combining monitoring simplicity with low power consumption.
Data Source
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AI summary
The present disclosure describes methods, system, and devices for determining a location of paging early indication (PEI). One method includes receiving, by a user equipment (UE), configuration information of a paging early indication occasion (PEI-O), wherein the configuration information comprises a frame-level offset list and a symbol-level offset list, the frame-level offset list comprises one or more frame-level offset, and the symbol-level offset list comprises one or more symbol-level offset; and detecting, by the UE, a paging early indication (PEI) in the PEI-O, wherein the PEI-O is determined by a frame-level offset from a start of a first paging frame (PF) of at least one PF associated with the PEI-O to a reference point and a symbol-level offset from the reference point to a start of a first physical downlink control channel (PDCCH) monitor occasion of the PEI-O.